CN215474999U

CN215474999U - Safety belt system with buckle limiting function

Info

Publication number: CN215474999U
Application number: CN202120642644.6U
Authority: CN
Inventors: 郑钦明; 王瑞璐
Original assignee: Wonderland Switzerland AG
Current assignee: Wonderland Switzerland AG
Priority date: 2021-03-30
Filing date: 2021-03-30
Publication date: 2022-01-11
Anticipated expiration: 2031-03-30
Also published as: TW202236996A; TWI820652B; DE102022107597A1; US20220314925A1

Abstract

The utility model discloses a safety belt system with a buckle limiting function, which is characterized by comprising an upper buckle, an upper woven belt and a limiting device, wherein the upper woven belt passes through the upper buckle in a sliding manner, the upper woven belt comprises a waist section and a shoulder section which are separated by the upper buckle, the limiting device utilizes an anti-slip structure with a high friction coefficient to clamp the upper woven belt and also utilizes a stop piece to abut against the upper buckle, so that when the shoulder section is pulled in the process of emergency braking or collision of a carrier, the upper buckle is effectively limited to slide towards the waist section relative to the upper woven belt, and further, a passenger is prevented from being injured due to the over-shortened length of the waist section.

Description

Safety belt system with buckle limiting function

Technical Field

The present invention relates to a safety belt system, and more particularly, to a safety belt system with a buckle position-limiting function.

Background

Seat belt systems secure an occupant in a seat of a vehicle (e.g., a vehicle) while the occupant is seated in the seat to ensure the occupant's ride safety. Referring to fig. 1, fig. 1 is a partial structural schematic diagram of a seat belt system 1' in the prior art. As shown in fig. 1, the conventional seat belt system 1 'includes a buckle set 11' and a webbing set 12 ', the buckle set 11' includes two upper buckles 111 'and a cross-belt buckle 112' capable of being buckled with the two upper buckles 111 ', the webbing set 12' includes two upper webbings 121 'and a cross-belt 122', each upper webbing 121 'slidably passes through the corresponding upper buckle 111' to connect with the corresponding upper buckle 111 ', each upper webbing 121' includes a shoulder section 1211 'and a waist section 1212' separated by the corresponding upper buckle 111 ', the cross-belt 122' slidably passes through the cross-belt buckle 112 'to connect with the cross-belt buckle 112', the shoulder section 1211 'and the waist section 1212' of each upper webbing 121 'are connected with the cross-belt 122' to connect with the seat, when the two upper buckles 111 'are fastened to the cross buckle 112', the shoulder 1211 'and the waist 1212' of the two upper straps 121 'and the cross strap 122' can fix the torso of the occupant to the seat together.

However, when the vehicle is braked or crashed, the shoulder portion 1211 ' of each upper webbing 121 ' is pulled by the forward movement of the chest or shoulder of the occupant, so that the upper buckle 111 ' is driven to slide relative to the waist portion 1212 ' of the upper webbing 121 ' towards the waist portion 1212 ' of the upper webbing 121 ', and the length of the waist portion 1212 ' is shortened, and the shortened waist portion 1212 ' not only limits the forward movement of the waist or abdomen of the occupant, but also increases the acceleration force acting on the waist or abdomen of the occupant, thereby possibly causing injury to the waist or abdomen of the occupant.

SUMMERY OF THE UTILITY MODEL

Therefore, an object of the present invention is to provide a safety belt system with a buckle spanning position limiting function to solve the above problems.

To achieve the above object, the present invention discloses a safety belt system with a buckle position-limiting function, the safety belt system includes an upper buckle, an upper webbing slidably passing through the upper buckle, the upper webbing includes a waist section and a shoulder section separated by the upper buckle, and a position-limiting device for limiting the upper buckle from sliding toward the waist section relative to the upper webbing when the shoulder section is pulled in an emergency braking or collision process of a vehicle.

According to an embodiment of the present invention, a through groove is formed on the upper buckle, the limiting device includes a slip-preventing structure and a rod-like structure, the rod-like structure is disposed on the upper buckle, the through groove includes a first portion and a second portion separated by the rod-like structure, the first portion is adjacent to the waist section, the second portion is adjacent to the shoulder section, and the upper webbing passes through the first portion of the through groove from bottom to top and then passes through the second portion of the through groove from top to bottom.

According to an embodiment of the present invention, the rod-shaped structure is fixed on the upper buckle, the anti-slip structure is disposed on a wall surface of the rod-shaped structure and is used for engaging with the upper webbing, and when the upper webbing is forced to be tightly attached to the anti-slip structure, the upper webbing is engaged by the anti-slip structure, so as to limit the upper buckle from sliding toward the waist section relative to the upper webbing.

According to an embodiment of the present invention, the rod-shaped structure is slidably disposed on the upper buckle, the anti-slip structure is disposed on at least one of a wall surface of the rod-shaped structure and a wall surface of the first portion of the through groove, the anti-slip structure is configured to engage with the upper webbing, and when the upper webbing is forced to drive the rod-shaped structure to slide relative to the upper buckle towards the wall surface of the first portion of the through groove, the upper webbing is engaged with the anti-slip structure, so as to limit the upper buckle from sliding relative to the upper webbing towards the waist section.

According to an embodiment of the present invention, the rod-shaped structure is slidably disposed on the upper buckle, the position-limiting device further includes an inclined plane structure, the inclined plane structure is disposed on a wall surface of the rod-shaped structure adjacent to the first portion of the through groove, a protruding length of the inclined plane structure increases from top to bottom, the anti-slip structure is disposed on the inclined plane structure, and when the upper webbing is forced to cling to the anti-slip structure, the upper webbing is engaged with the anti-slip structure, so as to limit the upper buckle from sliding toward the waist section relative to the upper webbing.

According to an embodiment of the present invention, the limiting device further includes an operating structure and a resetting member, the operating structure is connected to the rod-like structure, the resetting member is abutted between the rod-like structure and the upper buckle, the operating structure is configured to drive the rod-like structure to slide away from the wall surface of the first portion of the through groove, and the resetting member is configured to enable the rod-like structure to have potential energy of sliding towards the wall surface of the first portion of the through groove.

According to an embodiment of the present invention, the rod-shaped structure is rotatably disposed on the upper buckle, the anti-slip structure is disposed on at least one of a wall surface of the rod-shaped structure and a wall surface of the second portion of the through groove, the anti-slip structure is configured to engage with the upper webbing, and when the upper webbing is forced to drive the rod-shaped structure to rotate along an engaging direction relative to the upper buckle, the upper webbing is engaged with the anti-slip structure, so as to limit the upper buckle from sliding towards the waist section relative to the upper webbing.

According to one embodiment of the present invention, the limiting device further comprises an inclined plane structure, the inclined plane structure is disposed on the wall surface of the rod-shaped structure, the protruding length of the inclined plane structure increases from bottom to top, and the anti-slip structure is disposed on the inclined plane structure.

According to an embodiment of the present invention, the position-limiting device further includes a reset member, the reset member is abutted between the rod-shaped structure and the upper buckle and is used for enabling the rod-shaped structure to have potential energy rotating towards the engaging direction.

According to one embodiment of the present invention, a through groove is formed on the upper buckle, the upper webbing slidably passes through the through groove, the limiting device includes an inclined plane structure and a slip-preventing structure, the inclined plane structure is disposed on a wall surface of the through groove, a protruding length of the inclined plane structure increases from bottom to top, the slip-preventing structure is disposed on the inclined plane structure, and when the upper webbing is forced to cling to the slip-preventing structure, the upper webbing is engaged by the slip-preventing structure, so as to limit the upper buckle to slide toward the waist section relative to the upper webbing.

According to an embodiment of the present invention, the position-limiting device includes a stop member, and the stop member is detachably disposed on the waist section and used for abutting against the upper buckle, so as to limit the upper buckle to slide toward the waist section relative to the upper webbing.

In summary, the present invention utilizes the anti-slip structure with a higher friction coefficient to engage the upper webbing, so that when the shoulder section of the upper webbing is pulled during emergency braking or collision of the vehicle, the present invention can effectively limit the upper buckle from sliding relative to the waist section of the upper webbing toward the upper webbing through the engagement of the anti-slip structure and the upper webbing, thereby preventing the length of the waist section of the upper webbing from being excessively shortened, and further preventing the waist or abdomen of the seat occupant from being injured. In addition, the utility model also utilizes the stop piece which is detachably arranged on the waist section to abut against the upper buckle, so that in the process that the upper buckle slides towards the waist section relative to the upper mesh belt, the utility model can effectively limit the upper buckle to slide towards the waist section relative to the upper mesh belt through the abutment of the stop piece and the upper buckle, thereby avoiding the length of the waist section of the upper mesh belt from being excessively shortened, and further avoiding the waist or the abdomen of a passenger from being injured.

Drawings

FIG. 1 is a schematic diagram of a portion of a prior art seat belt system.

Fig. 2 is a partial structural view of a seat belt system according to a first embodiment of the present invention.

Fig. 3 is a schematic partial cross-sectional view of a seat belt system according to a first embodiment of the present invention.

Fig. 4 is a partial structural view of a seat belt system according to a second embodiment of the present invention.

Fig. 5 is a schematic partial cross-sectional view of a seat belt system according to a second embodiment of the present invention.

Fig. 6 is a partial structural view of a seat belt system according to a third embodiment of the present invention.

Fig. 7 is a schematic partial cross-sectional view of a seat belt system according to a third embodiment of the present invention.

Fig. 8 is a partial structural view of a seat belt system according to a fourth embodiment of the present invention.

Fig. 9 is a schematic partial cross-sectional view of a seat belt system according to a fourth embodiment of the present invention.

Figure 10 is a schematic view of a portion of a fifth embodiment of a seat belt system in accordance with the present invention.

Fig. 11 is a schematic partial cross-sectional view of a fifth embodiment of a seat belt system in accordance with the present invention.

Fig. 12 is a partial structural view of a seat belt system according to a sixth embodiment of the present invention.

Fig. 13 to 17 are partial structural schematic views of a seat belt system according to another embodiment of the present invention.

Wherein the reference numerals are as follows:

1', 1A, 1B, 1C, 1D, 1E, 1F, seat belt system

1G、1H、1I、1J、1K

11', 11A, 11B, 11C, 11D, 11E, fastener group

11F、11G、11H、11I、11J、11K

111', 111A, 111B, 111C, 111D, top buckle

111E、111F、111G、111H、111I、111J、

111K

112', 112A, 112B, 112C, 112D, cross belt buckle

112E、112F、112G、112H、112I、112J、

112K

113A, 113B, 113C, 113D, 113E through groove

1131A, 1131B, 1131C, 1131D first part

1132A, 1132B, 1132C, 1132D second part

12', 12A, 12B, 12C, 12D, 12E, set of webbings

12F、12G、12H、12I、12J、12K

121', 121A, 121B, 121C, 121D, and a mesh belt

121E、121F、121G、121H、121I、

121J、121K

1211', 1211A, 1211B, 1211C, shoulder section

1211D、1211E、1211F、1211G、1211H、

1211I、1211J、1211K

1212', 1212A, 1212B, 1212C, waist section

1212D、1212E、1212F、1212G、

1212H、1212I、1212J、1212K

122', 122A, 122B, 122C, 122D, a strap

122E、122F、122G、122H、122I、

122J、122K

13A, 13B, 13C, 13D, 13E, 13F, stop device

13G、13H、13I、13J、13K

131A, 131B, 131C, 131D, 131E anti-slip structure

131F stopper

132A, 132B, 132C, 132D rod-like structures

133C, 133D, 132E bevel structure

134C operation structure

135C, 134D reset piece

D1 engagement direction

D2 Release Direction

W1B, W1C, W1E wall

Detailed Description

Directional terms as referred to in the following examples, for example: up, down, left, right, front or rear, etc., are referred to only in the direction of the attached drawings. Accordingly, the directional terminology is used for purposes of illustration and is in no way limiting.

Referring to fig. 2 and 3, fig. 2 is a partial structural schematic view of a seat belt system 1A according to a first embodiment of the present invention, and fig. 3 is a partial sectional schematic view of the seat belt system 1A according to the first embodiment of the present invention. As shown in fig. 2 and 3, the seat belt system 1A includes a buckle set 11A, a webbing set 12A and a position-limiting device 13A, the buckle set 11A includes two upper buckles 111A and a buckle 112A, the webbing set 12A includes two upper webbings 121A and a cross-belt 122A, each upper webbing 121A slidably passes through the corresponding upper buckle 111A to connect with the corresponding upper buckle 111A, the cross-belt 122A slidably passes through the cross-belt buckle 112A to connect with the cross-belt buckle 112A, each upper webbing 121A includes a shoulder section 1211A and a waist section 1212A separated by the corresponding upper buckle 111A, and when the two upper buckles 111A are buckled to the cross-belt buckle 112A, the shoulder section 1211A, the waist section 1212A and the cross-belt 122A of the two upper webbings 121A can jointly fix the body of the occupant to the seat of the vehicle. The position limiting device 13A is used for limiting the upper buckle 111A to slide towards the waist section 1212A relative to the upper webbing 121A when the shoulder section 1211A of the upper webbing 121A is pulled during emergency braking or collision of the vehicle, so as to prevent the length of the waist section 1212A of the upper webbing 121A from being excessively shortened, and further prevent the waist or abdomen of the seat occupant from being injured.

In this embodiment, the upper buckle 111A is formed with a through groove 113A, the limiting device 13A includes a slip-preventing structure 131A and a rod-like structure 132A, the rod-like structure 132A is fixedly disposed on the upper buckle 111A, the through groove 113A includes a first portion 1131A and a second portion 1132A separated by the rod-like structure 132A, the first portion 1131A of the through groove 113A is adjacent to the waist portion 1212A of the upper webbing 121A, the second portion 1132A of the through groove 113A is adjacent to the shoulder portion 1211A of the upper webbing 121A, the upper webbing 121A passes through the first portion 1131A of the through groove 113A from bottom to top and then passes through the second portion 1132A from top to bottom, and the slip-preventing structure 131A is disposed on a wall surface of the rod-like structure 132A and is used to engage the upper webbing 121A.

Specifically, the anti-slip structure 131A may include a plurality of engaging teeth, which may be disposed on the rod-shaped structure 132A and located in the first portion 1131A and the second portion 1132A of the through groove 113A to increase a friction coefficient between the upper webbing 121A and the upper buckle 111A, so as to prevent the upper buckle 111A from sliding relative to the upper webbing 121A toward the waist section 1212A of the upper webbing 121A. For example, in another embodiment, the plurality of engaging teeth of the anti-slip structure may be located on only one of the first portion and the second portion of the through groove. Alternatively, in another embodiment, the anti-slip structure may comprise other structures having a rough surface contacting the belt to increase the coefficient of friction between the belt and the buckle.

When the shoulder 1211A of the upper webbing 121A is pulled due to the forward movement of the chest or the shoulder of the seat occupant during the emergency braking or collision of the vehicle, the upper webbing 121A is tightly attached to the anti-slip structure 131A, so that the anti-slip structure 131A can engage with the upper webbing 121A to limit the upper buckle 111A from sliding relative to the upper webbing 121A toward the waist portion 1212A, thereby preventing the waist portion 1212A of the upper webbing 121A from being excessively shortened in length and preventing the waist or the abdomen of the seat occupant from being injured.

Referring to fig. 4 and 5, fig. 4 is a partial structural schematic view of a seat belt system 1B according to a second embodiment of the present invention, and fig. 5 is a partial sectional schematic view of the seat belt system 1B according to the second embodiment of the present invention. As shown in fig. 4 and 5, the seat belt system 1B includes a buckle set 11B, a webbing set 12B and a position-limiting device 13B, the buckle set 11B includes two upper buckles 111B and a buckle 112B for spanning belt, the webbing set 12B includes two upper webbings 121B and a spanning belt 122B, each upper webbing 121B slidably passes through the corresponding upper buckle 111B to connect with the corresponding upper buckle 111B, the spanning belt 122B slidably passes through the spanning buckle 112B to connect with the spanning buckle 112B, and each upper webbing 121B includes a shoulder section 1211B and a waist section 1212B separated by the corresponding upper buckle 111B.

The limiting device 13B includes an anti-slip structure 131B and a rod-like structure 132B, the rod-like structure 132B is slidably disposed on the upper buckle 111B, a through slot 113B is formed on the upper buckle 111B, the through slot 113B includes a first portion 1131B and a second portion 1132B separated by the rod-like structure 132B, the first portion 1131B is adjacent to the waist section 1212B of the upper webbing 121B, the second portion 1132B is adjacent to the shoulder section 1211B of the upper webbing 121B, the upper webbing 121B passes through the first portion 1131B from bottom to top and then passes through the second portion 1132B from top to bottom, and the anti-slip structure 131B is disposed on a wall surface W1B of the first portion 1131B of the through slot 113B facing the rod-like structure 132B for engaging with the upper webbing 121B.

For example, in another embodiment, the anti-slip structure may be disposed on the wall surface of the rod-shaped structure facing the first portion of the through groove, or on the wall surface of the rod-shaped structure and the wall surface of the first portion of the through groove facing each other.

When the shoulder portion 1211B of the upper webbing 121B is pulled due to the forward movement of the chest or the shoulder of the occupant during the emergency braking or collision of the vehicle, the upper webbing 121B is forced to drive the rod-shaped structure 132B to slide relative to the upper buckle 111B toward the wall surface W1B of the first portion 1131B of the through slot 113B, so that the upper webbing 121B is clamped between the rod-shaped structure 132B and the wall surface W1B of the first portion 1131B of the through slot 113B and is tightly attached to the anti-slip structure 131B, and therefore the upper webbing 121B can be engaged by the anti-slip structure 131B to limit the upper buckle 111B from sliding relative to the upper webbing 121B toward the waist portion 1212B, thereby preventing the length of the waist portion 1212B of the upper webbing 121B from being excessively shortened and preventing the occupant or the abdomen from being injured.

Referring to fig. 6 and 7, fig. 6 is a partial structural schematic view of a seat belt system 1C according to a third embodiment of the present invention, and fig. 7 is a partial sectional schematic view of the seat belt system 1C according to the third embodiment of the present invention. As shown in fig. 6 and 7, the seat belt system 1C includes a buckle set 11C, a webbing set 12C and a position-limiting device 13C, the buckle set 11C includes two upper buckles 111C and upper buckles 111C, the webbing set 12C includes two upper webbings 121C and upper webbing 121C, each upper webbing 121C slidably passes through the corresponding upper buckle 111C to connect with the corresponding upper buckle 111C, the cross-webbing 122C slidably passes through the cross-webbing buckle 112C to connect with the cross-webbing buckle 112C, and each upper webbing 121C includes a shoulder section 1211C and a waist section 1212C separated by the corresponding upper buckle 111C.

The position limiting device 13C includes a slip-preventing structure 131C, a rod-shaped structure 132C, a slope structure 133C, an operating structure 134C and two resetting members 135C, the rod-shaped structure 132C is slidably disposed on the upper buckle 111C, the operating structure 134C connects the rod-shaped structure 132C to form a square structure together with the rod-shaped structure 132C, the upper buckle 111C is formed with a through slot 113C, the through slot 113C includes a first portion 1131C and a second portion 1132C separated by the rod-shaped structure 132C, the first portion 1131C is adjacent to the waist section 1212C of the upper webbing 121C, the second portion 1132C is adjacent to the shoulder section C of the upper webbing 121C, the upper webbing 121C passes through the first portion 1131C from bottom 1211 to top and then passes through the second portion 1132C from top to bottom, the operating structure 134C is used to drive the rod-shaped structure 132C to slide away from the wall W1C of the first portion 113C of the through slot 113C, the slope structure 133C is disposed on the wall of the rod-shaped structure 132C adjacent to the wall W1C of the first portion 1131C, the protrusion length of the inclined plane structure 133C increases from top to bottom, so as to form a wedge-shaped or trapezoid-shaped structure together with the rod-shaped structure 132C, the anti-slip structure 13C is disposed on the inclined plane structure 133C and is used for engaging the upper webbing 121C, and the reset member 135C abuts between the rod-shaped structure 132C and the upper buckle 111C, so that the rod-shaped structure 132C has a potential energy of sliding toward the wall W1C of the first portion 1131C of the through groove 113C.

In this embodiment, the upper webbing 121C can be clamped between the bar structure 132C and the wall W1C of the first portion 1131C of the through slot 113C by the provision of the return member 135C unless the occupant operating structure 134C drives the bar structure 132C to slide away from the wall W1C. Therefore, when the shoulder section 1211C of the upper webbing 121C is forced to drive the upper buckle 111C to slide toward the waist section 1212C relative to the upper webbing 121C, the upper webbing 121C is tightly attached to the anti-slip structure 131C, so as to limit the upper buckle 111C from sliding toward the waist section 1212C relative to the upper webbing 121C. In addition, by the arrangement of the inclined surface structure 133C, when the waist section 1212C of the upper webbing 121C is forced to drive the upper buckle 111C to slide toward the shoulder section 1211C relative to the upper webbing 121C, the upper webbing 121C does not cling to the anti-slip structure, thereby facilitating the upper buckle 111C to slide toward the shoulder section 1211C relative to the upper webbing 121C.

In detail, when the shoulder portion 1211C of the upper webbing 121C is pulled due to the forward movement of the chest or the shoulder of the occupant during the emergency braking or collision of the vehicle, since the upper webbing 121C is clamped between the wall surface W1C of the first portion 1131C and the rod-shaped structure 132C driven by the reset piece 135C, the upper webbing 121C is tightly attached to the anti-slip structure 131C, so that the upper webbing 121C is engaged by the anti-slip structure 131C to limit the upper buckle 111C from sliding toward the waist portion 1212C relative to the upper webbing 121C, thereby preventing the length of the waist portion 1212C of the upper webbing 121C from being excessively shortened, and further preventing the occupant from being injured at the waist or the abdomen.

Further, when the occupant intends to extend the length of the shoulder section 1211C by sliding the upper buckle 111C relative to the upper webbing 121C toward the waist section 1212C, the operation structure 134C is operable to drive the rod-like structure 132C to slide away from the wall surface W1C of the first portion 1131C of the through groove 113C, so that the upper webbing 121C is no longer clamped between the rod-like structure 113C and the wall surface W1C of the first portion 1131C. At this time, the upper webbing 121C is not tightly attached to the anti-slip structure 131C when the force is applied, so that the upper buckle 111C can slide toward the waist section 1212C relative to the upper webbing 121C to extend the length of the shoulder section 1211C.

In addition, when the rider wants to drive the upper buckle 111C to slide relative to the upper webbing 121C toward the shoulder section 1211C and apply a force to the waist section 1212C to extend the length of the waist section 1212C, the upper webbing 121C does not cling to the anti-slip structure 131C due to the arrangement of the ramp structure 133C, so that the upper buckle 111C can directly slide relative to the upper webbing 121C toward the shoulder section 1211C without operating the operating structure 134C. In other words, the inclined surface structure 133C has a function of allowing the upper buckle 111C to slide toward the shoulder portion 1211C relative to the upper webbing 121C without operating the operating structure 134C.

Referring to fig. 8 and 9, fig. 8 is a partial structural schematic view of a seat belt system 1D according to a fourth embodiment of the present invention, and fig. 9 is a partial sectional schematic view of the seat belt system 1D according to the fourth embodiment of the present invention. As shown in fig. 8 and 9, the seat belt system 1D includes a buckle set 11D, a webbing set 12D and a position-limiting device 13D, the buckle set 11D includes two upper buckles 111D and a belt-spanning buckle 112D, the webbing set 12D includes two upper webbings 121D and a belt-spanning 122D, each upper webbing 121D slidably passes through the corresponding upper buckle 111D to connect with the corresponding upper buckle 111D, the belt-spanning 122D slidably passes through the belt-spanning buckle 112D to connect with the belt-spanning buckle 112D, and each upper webbing 121D includes a shoulder section 1211D and a waist section 1212D separated by the corresponding upper buckle 111D.

The position-limiting device 13D includes an anti-slip structure 131D, a rod structure 132D, a slope structure 133D and a reset member 134D. The upper buckle 111D is formed with a through groove 113D, the rod-shaped structure 132D is rotatably disposed on the upper buckle 111D, the through groove 113D includes a first portion 1131D and a second portion 1132D separated by the rod-shaped structure 132D, the first portion 1131D is adjacent to the waist section 1212D of the upper webbing 121D, the second portion 1132D is adjacent to the shoulder section 1211D of the upper webbing 121D, the upper webbing 121D passes through the first portion 1131D from bottom to top and then passes through the second portion 1132D from top to bottom, the slope structure 133D is disposed on the wall surface of the rod-shaped structure 132D adjacent to the wall surface of the second portion 1132D, the protruding length of the slope structure 133D increases from bottom to top, thereby forming a wedge-shaped or trapezoid-shaped structure together with the rod-shaped structure 132D, the anti-slip structure 131D is disposed on the inclined structure 133D, and the reset piece 134D abuts against the rod-shaped structure 132D and the upper buckle 111D and is used for enabling the rod-shaped structure 132D to have potential energy of rotating towards the engaging direction D1.

In this embodiment, the upper webbing 121D is held between the rod structure 132D and the wall of the second portion 1132D unless the rod structure 132D is driven to rotate in the release direction D2 opposite to the engagement direction D1. Therefore, when the shoulder section 1211D of the upper webbing 121D is forced to drive the upper buckle 111D to slide toward the lap section 1212D with respect to the upper webbing 121D, the upper webbing 121D abuts against the anti-slip structure 131D, thereby restricting the upper buckle 111D from sliding toward the lap section 1212D with respect to the upper webbing 121D. In addition, by the arrangement of the inclined surface structure 133D, when the waist section 1212D of the upper webbing 121D is forced to drive the upper buckle 111D to slide toward the shoulder section 1211D relative to the upper webbing 121D, the upper webbing 121D does not cling to the anti-slip structure, thereby facilitating the sliding of the upper buckle 111D toward the shoulder section 1211D relative to the upper webbing 121D.

In detail, when the position-limiting section 1212D of the upper webbing 121D is pulled due to the forward movement of the chest or the shoulder of the seat occupant during the emergency braking or collision of the vehicle, since the upper webbing 121D is clamped between the wall surface of the second portion 1131D and the rod-shaped structure 132D driven by the reset piece 134D, the upper webbing 121D is tightly attached to the anti-slip structure 131D, so that the upper webbing 121D is clamped by the anti-slip structure 131D to limit the upper buckle 111D from sliding toward the waist section 1212D relative to the upper webbing 121D, thereby preventing the length of the waist section 1212D of the upper webbing 121D from being excessively shortened, and further preventing the waist or the abdomen of the seat occupant from being injured.

In addition, when the rider intends to drive the upper buckle 111D to slide relative to the upper webbing 121D toward the shoulder section 1211D to apply a force to the waist section 1212D to extend the length of the waist section 1212D, due to the arrangement of the inclined surface structure 133D, the rod-shaped structure 132D can be driven by the upper webbing 121D to rotate relative to the upper buckle 111D along the releasing direction D2, so that the upper webbing 121D is no longer clamped between the wall surface of the second portion 1132D and the rod-shaped structure 132D and is no longer tightly attached to the anti-slip structure 131D, and the upper buckle 111D can directly slide relative to the upper webbing 121D toward the shoulder section 1211D.

Preferably, in this embodiment, the limiting device may further include an angle limiting member to limit the rotation angle of the rod-shaped structure, so as to prevent the rod-shaped structure from over-rotating. For example, the angle limiting member can prevent the inclined plane structure and the anti-slip structure from rotating and being located on the first portion. Furthermore, in another embodiment, the rod-like structure may include a rotating shaft and a rotating piece, the rotating piece is rotatably disposed on the belt spanning buckle via the rotating shaft, the rotating piece may be made of plastic material, and the anti-slip structure is disposed on the rotating piece.

Referring to fig. 10 and 11, fig. 10 is a partial structural view of a seat belt system 1E according to a fifth embodiment of the present invention, and fig. 11 is a partial sectional view of the seat belt system 1E according to the fifth embodiment of the present invention. As shown in fig. 10 and 11, the seat belt system 1E includes a buckle set 11E, a webbing set 12E and a limiting device 13E, the buckle set 11E includes two upper buckles 111E and a buckle 112E for spanning the webbing, the webbing set 12E includes two upper webbings 121E and a webbing strap 122E, each upper webbing 121E slidably passes through the corresponding upper buckle 111E to connect with the corresponding upper buckle 111E, the webbing strap 122E slidably passes through the buckle 112E for spanning the webbing buckle 112E to connect with the webbing strap buckle 112E, and each upper webbing 121E includes a shoulder section 1211E and a waist section 1212E separated by the corresponding upper buckle 111E. The position limiting device 13E includes an anti-slip structure 131E and an inclined structure 132E, a through slot 113E is formed on the upper buckle 111E, the upper braid 121E passes through the through slot 113E, the inclined structure 132E is disposed on the wall W1E of the through slot 113E, the protruding length of the inclined structure 132E increases from bottom to top, and the anti-slip structure 131E is disposed on the inclined structure 132E. In this embodiment, when the shoulder portion 1211E of the upper webbing 121E is forced to drive the upper buckle 111E to slide toward the waist portion 1212E relative to the upper webbing 121E, the upper webbing 121E is forced to cling to the anti-slip structure 131E, so that the upper webbing 121E is engaged by the anti-slip structure 131E to limit the upper buckle 111E to slide toward the waist portion 1212E relative to the upper webbing 121E. When the waist portion 1212E of the upper webbing 121E is forced to drive the upper buckle 111E to slide toward the shoulder portion 1211E relative to the upper webbing 121E, due to the arrangement of the inclined surface structure 132E, the upper webbing 121E does not cling to the anti-slip structure 131E, so that the upper buckle 111E can slide toward the shoulder portion 1211E relative to the upper webbing 121E.

Referring to fig. 12, fig. 12 is a partial structural schematic view of a seat belt system 1F according to a sixth embodiment of the present invention. As shown in fig. 12, the seat belt system 1F includes a buckle set 11F, a webbing set 12F and a position-limiting device 13F, the buckle set 11F includes two upper buckles 111F and a buckle 112F, the webbing set 12F includes two upper webbings 121F and a cross-webbing 122F, each upper webbing 121F slidably passes through the corresponding upper buckle 111F to connect with the corresponding upper buckle 111F, the cross-webbing 122F slidably passes through the cross-webbing buckle 112F to connect with the cross-webbing buckle 112F, and each upper webbing 121F includes a shoulder section 1211F and a waist section 1212F separated by the corresponding upper buckle 111F. The limiting device 13F includes a stop member 131F detachably disposed on the waist section 1212F for abutting against the upper buckle 111F, so as to limit the upper buckle 111F to slide toward the waist section 1212F relative to the upper webbing 121F.

Preferably, in this embodiment, the static friction between the stopper 131F and the waist section 1212F prevents the stopper 131F from moving relative to the waist section 1212F after the stopper 131F is disposed in the free section 1211F. The stopper 131F may be spaced apart from the upper buckle 111F and may include a rectangular structure. For example, in another embodiment, the stopper can still slide relative to the free section after being disposed on the free section. Alternatively still, in another embodiment, when the stop member is disposed at the free section, the stop member may abut against the belt spanning buckle instead of being disposed at a distance from each other. Alternatively, in another embodiment, the stopper may also include an E-shaped structure (e.g., an E-shaped stop plate), a t-shaped structure (e.g., a t-shaped stop plate), or other components (e.g., a clip, a hair clip, a fastener, a velcro, etc.), and the stopper may be made of a plastic material or a metal material.

In addition, the seat belt systems of the first to fifth embodiments may further include a stopper detachably provided at a free section of the webbing. Referring to fig. 13 to 17, fig. 13 to 17 are partial structural schematic views of a seat belt system according to another embodiment of the present invention. As shown in fig. 13 to 17, the sliding of the buckle with respect to the strap toward the free section can be limited by the stop and the anti-slip structure. As shown in fig. 13, the safety belt system 1G includes a position-limiting device 13G, wherein the position-limiting device 13G is formed by integrating a position-limiting device 13A of the first embodiment with a position-limiting device 13F of the sixth embodiment. As shown in fig. 14, the safety belt system 1H includes a stopper 13H, wherein the stopper 13H is formed by integrating a stopper 13B of the second embodiment with a stopper 13F of the sixth embodiment. As shown in fig. 15, the safety belt system 1I includes a position-limiting device 13I, wherein the position-limiting device 13I is formed by integrating a position-limiting device 13C of the third embodiment with a position-limiting device 13F of the sixth embodiment. As shown in fig. 16, the safety belt system 1J includes a stopper 13J, wherein the stopper 13J is formed by integrating a stopper 13D of the fourth embodiment and a stopper 13F of the sixth embodiment. As shown in fig. 17, the safety belt system 1K includes a position-limiting device 13K, wherein the position-limiting device 13K is formed by integrating a position-limiting device 13E of the fifth embodiment with a position-limiting device 13F of the sixth embodiment.

Compared with the prior art, the utility model utilizes the anti-slip structure with higher friction coefficient to clamp the upper mesh belt, so that when the shoulder section of the upper mesh belt is pulled in the process of emergency braking or collision of a carrier, the utility model can effectively limit the upper buckle to slide relative to the waist section of the upper mesh belt towards the upper mesh belt through the clamping of the anti-slip structure and the upper mesh belt, thereby avoiding the over-shortening of the length of the waist section of the upper mesh belt and further avoiding the injury of the waist or the abdomen of a passenger. In addition, the utility model also utilizes the stop piece which is detachably arranged on the waist section to abut against the upper buckle, so that in the process that the upper buckle slides towards the waist section relative to the upper mesh belt, the utility model can effectively limit the upper buckle to slide towards the waist section relative to the upper mesh belt through the abutment of the stop piece and the upper buckle, thereby avoiding the length of the waist section of the upper mesh belt from being excessively shortened, and further avoiding the waist or the abdomen of a passenger from being injured.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A seat belt system having a buckle restraint function, the seat belt system comprising:

an upper buckle;

the upper mesh belt passes through the upper buckle in a sliding manner and comprises a waist section and a shoulder section which are separated by the upper buckle; and

and the limiting device is used for limiting the upper buckle to slide towards the waist section relative to the upper mesh belt when the shoulder section is pulled in the process of emergency braking or collision of a vehicle.

2. The safety belt system as claimed in claim 1, wherein the upper buckle has a through slot formed therein, the limiting device comprises a slip-resistant structure and a rod-like structure, the rod-like structure is disposed on the upper buckle, the through slot comprises a first portion and a second portion separated by the rod-like structure, the first portion is adjacent to the waist section, the second portion is adjacent to the shoulder section, and the upper webbing passes through the first portion of the through slot from bottom to top and then passes through the second portion of the through slot from top to bottom.

3. The seat belt system of claim 2, wherein the rod-shaped structure is fixed to the upper buckle, the slip prevention structure is provided on a wall surface of the rod-shaped structure and is configured to engage with the upper webbing, and when the upper webbing is forced to abut against the slip prevention structure, the upper webbing is engaged by the slip prevention structure, thereby restricting the upper buckle from sliding relative to the upper webbing toward the lap section.

4. The seat belt system of claim 2, wherein the rod-like structure is slidably disposed on the upper buckle, the slip-preventing structure is disposed on at least one of a wall surface of the rod-like structure and a wall surface of the first portion of the through-slot that face each other, the slip-preventing structure is configured to engage the upper webbing, and when the upper webbing is forced to drive the rod-like structure to slide relative to the upper buckle toward the wall surface of the first portion of the through-slot, the upper webbing is engaged by the slip-preventing structure, thereby limiting the upper buckle from sliding relative to the upper webbing toward the lumbar section.

5. The safety belt system as claimed in claim 2, wherein the rod-shaped structure is slidably disposed on the upper buckle, the stopper further comprises a ramp structure disposed on a wall surface of the rod-shaped structure adjacent to the first portion of the through-slot, a protruding length of the ramp structure increases from top to bottom, the anti-slip structure is disposed on the ramp structure, and when the upper webbing is forced to abut against the anti-slip structure, the upper webbing is engaged by the anti-slip structure, so as to limit the upper buckle from sliding relative to the upper webbing toward the lap section.

6. The seat belt system of claim 5, wherein the restraint device further comprises an operating structure and a return member, the operating structure is connected to the rod-like structure, the return member abuts between the rod-like structure and the upper buckle, the operating structure is configured to drive the rod-like structure to slide away from the wall of the first portion of the through-slot, and the return member is configured to cause the rod-like structure to have a potential to slide toward the wall of the first portion of the through-slot.

7. The safety belt system as claimed in claim 2, wherein the rod-shaped structure is rotatably disposed on the buckle, the anti-slip structure is disposed on at least one of a wall surface of the rod-shaped structure and a wall surface of the second portion of the through groove, the anti-slip structure is configured to engage with the upper webbing, and when the upper webbing is forced to drive the rod-shaped structure to rotate in an engaging direction relative to the buckle, the upper webbing is engaged by the anti-slip structure, so as to limit the buckle from sliding relative to the upper webbing toward the lap section.

8. The seat belt system according to claim 7 wherein the restraint device further comprises a ramp structure disposed on the wall of the bar structure, the ramp structure having a length that increases from bottom to top, and the anti-slip structure is disposed on the ramp structure.

9. The seat belt system of claim 7, wherein the restraint device further comprises a return element abutting between the rod-like structure and the upper buckle and configured to provide potential energy for the rod-like structure to rotate in the engaging direction.

10. The safety belt system as claimed in claim 1, wherein a through-groove is formed in the upper buckle, the upper webbing slidably passes through the through-groove, the stopper includes a slope structure and a slip-preventing structure, the slope structure is disposed on a wall surface of the through-groove, a protruding length of the slope structure increases from bottom to top, the slip-preventing structure is disposed on the slope structure, and when the upper webbing is forced to abut against the slip-preventing structure, the upper webbing is engaged by the slip-preventing structure, thereby restricting the upper buckle from sliding relative to the upper webbing toward the lap section.

11. A safety belt system according to any one of claims 1 to 10 wherein the limiting means comprises a stop which is removably provided at the lap section and is arranged to abut the upper buckle so as to limit the upper buckle from sliding relative to the upper webbing towards the lap section.